Cartridge-fuse receptacle with terminal clamping means



Jan.14,1947. E. P. SMITH Em 2 414,422

CARTRIDGE-FUSE RECEPTACLE WITH TERMINAL CLAMPING MEANS Filed Aug. 3,1944 3nnentor I 1' 4 6, Eur/120251141171 Patented Jan. 14, 1947 1 OFFICECARTRIDGE-FUSE RECEPTACLE WITH TERMINAL CLAMPING MEANS Edward P. Smithand Wade n. Utz, Mansfield, Ohio Application August 3, 1944, Serial No.547,896

2 Claims. 1

Our invention relates to fuse devices and has particular reference toholders for fuses, especially the cartridge type of fuse.

Conditions are often met in which the standard spring clip type of fuseholder for a cartridge fuse will not meet requirements as for instancewhen the currents involved are abnormally high requiring a specialholder or where the space in which the holder is mounted is too small topermit renewing a blown fuse.

We have provided a fuse holder for a cartridge type fuse in which theholder will clamp onto the terminals of the cartridge, thereby effectinga secure and efficient contact between the holder and the cartridgeterminals, suiiicient to carry' an abnormally high current; at the sametime we so construct the holder that the cartridge may easily be renewedwhen the holder is so placed that the cartridge may not be applied asinthe case of the spring clip holder or applied longitudinally withrespect to the terminals.

For a better understanding of our invention reference may be had to thedetailed description herein and the accompanying drawing, in which:

Fig. 1 .is a side view in partial section of our invention in which theholders are mounted in a receptacle of limited dimensions and shows themanner of inserting a fuse cartridge in place under such conditions. I

Fig. 2 is a view in partial section on the line 2--2 of Fig. 1. 7

When it is desired to use afuse to carry several hundred amperes,'moreefllcient contact means must be provided than is found inthe standardspring cllp 'holder and also in many of the improved types thereof.

Referring to Fig. 1, th base I may be of'any suitable insulatingmaterial such as porcelain, fiber, slate, etc. Mounted on the, base arethe terminal members T and T.

2 increases the threaded attachment of the screw 4 to the terminal. v

The sides of the loop-shaped member 2 are each provided with alongitudinal slot l2. Mounted within the loop-shaped member 2 is alongitudinally movable clamping member 13 provided with a curved surfaceto conform to that of the cartridge terminal and laterally projectingguides l4 rojecting into and longitudinally movable in the slots l2.

The clamping member I3 is movedinto and held in secure clampingengagement with the terminal 6 of the fuse cartridge C, thus providingsecure and efficient electrical contact between the fuse terminal andthe contacting parts of the holder terminal, and more dependable andreliable than the spring clip and some other types of terminalsespecially for high currents.

The guides ll permit the clamping members ill to pivot relative to theloop-shaped members 2, thus providing adjustment between the terminals 6and the contacting parts thereby aiding in effecting more efilcientcontact between the parts.

This pivotal feature of the clamping member l3, aids materially inapplying the cartridge C to the holder when the terminals T and T aremounted in a confined space as shown in Fig. '1, the base I beingprovided with end walls I and side walls I.

Under such conditions the clamping member l3 of one terminal T may beraised to its limit as shown in Fig. 1 and pivoted to one side, all theer 8. Other means may be employed to secure the parts together such asthreading the means 1 into a threaded opening in the base.

Projecting from the means I is a threaded stud l to receive a conductoror a cable terminal, and held in place by nut l0.

The portion 2 is provided with a boss H which result of the slot I2 andguide H which also retains the parts assembled.

To add to the ease of inserting the fuse holder C in position the screw4 of'the terminal T may be lowered as far aspossible.

Fig. 1 shows clearly the method of renewing a.

cartridge fuse C when the terminals T and T are located in a confinedspace and the fuse C cannot be inserted longitudinally or endwise.

While we have shown terminals T and T' as duplicates, one terminal, T asinthe case of Fig.

1 1 may be made without the pivotal feature as it is benefit.

terminals and the base as iswell known to and used by those skilled inthe art.

Having described our invention, what we wish to protect is set forth inthe accompanying claims.

We claim:

1. A fuse holder comprising, a receptacle with an insulated base andupstanding end walls preventing insertion of the fuse endwise of thetermina1s,a pair of spaced and insulated terminals secured to the basemember, means to attach conductors to the terminals, each terminalhaving a rigid yoke shaped member with a fixed seat to receive theterminal of a fuse and a clamping member associated with each terminalto engage the fuse terminal and cooperate with the said seat in securingthe fuse terminal in position, one terminal having longitudinallydisposed slots in its side members and its clamping member having meanspositioned in the slots whereby the clamping member in the said oneterminal is movable toward and away from its seat and tiltable relativethereto whereby a fuse maybe inserted in position in the terminals, athreaded member as- 'fuse terminals to be positioned properly in theterminals by tilting the clamping member of the said one terminal andmoving it away from the seat and inserting the fuse therebetween withoutinterference from the said other wall.

2. A fuse holder comprising, a receptacle with a base and upstanding endwalls, a pair of spaced and insulated terminals secured to the base,means to attach conductors to the terminals, each terminal having arigid yoke shaped member with a fixed seat to receive the terminal on afuse, each terminal provided with a clamping member longitudinallymovable relative to the yoke member to engage the fuse terminal and holdit against the associated seat, means to move each clamping member intoengagement with the fuse terminal and the fuse terminal into engagementwith the associated seat, the end walls so positioned relative to theterminals that the fuse is prevented from being inserted in theterminals endwise thereof, means on one clamping member- EDWARD VP.sMI'r'H. WADE H. UTZ.

